Question

1. Give an example where corrosion is an advantage rather than disadvantage.
2. Write 2 limitations of chemical reaction?

Answer 1

1. One example is the formation of aluminium oxide over the Aluminium ,which further protects the deterioration of Aluminium and act as barrier for air and moisture.

2. Considering the question to be "limitations of chemical equations",
              (a) It does not give any info regarding the speed of the reaction
              (b) The reaction may or may not be complete. Equation does not reveal it

Answer 2

Aluminium oxide.
because it is used for packing food items.